# # Block layer core configuration # config BLOCK bool "Enable the block layer" if EMBEDDED default y help This permits the block layer to be removed from the kernel if it's not needed (on some embedded devices for example). If this option is disabled, then blockdev files will become unusable and some filesystems (such as ext3) will become unavailable. This option will also disable SCSI character devices and USB storage since they make use of various block layer definitions and facilities. Say Y here unless you know you really don't want to mount disks and suchlike. if BLOCK config LBD bool "Support for Large Block Devices" depends on !64BIT help Say Y here if you want to attach large (bigger than 2TB) discs to your machine, or if you want to have a raid or loopback device bigger than 2TB. Otherwise say N. config BLK_DEV_IO_TRACE bool "Support for tracing block io actions" depends on SYSFS select RELAY select DEBUG_FS help Say Y here, if you want to be able to trace the block layer actions on a given queue. Tracing allows you to see any traffic happening on a block device queue. For more information (and the user space support tools needed), fetch the blktrace app from: git://brick.kernel.dk/data/git/blktrace.git config LSF bool "Support for Large Single Files" depends on !64BIT help Say Y here if you want to be able to handle very large files (bigger than 2TB), otherwise say N. If unsure, say Y. endif source block/Kconfig.iosched